Inventor
WEIRICH WALTER
DE49 patents
⚠️ This page may combine multiple inventors who share the name “WEIRICH WALTER”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GEWERK EISENHUETTE WESTFALIA
46 patentsUS4378027AMar 29, 1983
Control unit for an electro-hydraulic roof support control arrangement
GEWERK EISENHUETTE WESTFALIA28 citations93
US4149567AApr 17, 1979
Multi-core hydraulic duct
GEWERK EISENHUETTE WESTFALIA31 citations93
US4544185AOct 1, 1985
Hydraulic coupling device
GEWERK EISENHUETTE WESTFALIA39 citations92
US4378124AMar 29, 1983
Hydraulic coupling device
GEWERK EISENHUETTE WESTFALIA31 citations92
US4319772AMar 16, 1982
Hydraulic coupling device
GEWERK EISENHUETTE WESTFALIA33 citations87
US4427321AJan 24, 1984
Mineral mining installation
GEWERK EISENHUETTE WESTFALIA20 citations82
US4313463AFeb 2, 1982
Pressure-relief valve device
GEWERK EISENHUETTE WESTFALIA25 citations82
US4247135AJan 27, 1981
Hydraulic coupling device
GEWERK EISENHUETTE WESTFALIA25 citations82
US4755084AJul 5, 1988
Multi-part roof-contacting structures of mine roof supports
GEWERK EISENHUETTE WESTFALIA11 citations74
US4716928AJan 5, 1988
Pressure-relief valve devices
GEWERK EISENHUETTE WESTFALIA18 citations74
US4702148AOct 27, 1987
Control of the actuation of hydraulic consumers
GEWERK EISENHUETTE WESTFALIA14 citations74
US4552487ANov 12, 1985
Mine roof support unit having dust suppression means
GEWERK EISENHUETTE WESTFALIA11 citations74
US4327628AMay 4, 1982
Hydraulic roof support control system
GEWERK EISENHUETTE WESTFALIA10 citations74
US4307981ADec 29, 1981
Mineral mining installation
GEWERK EISENHUETTE WESTFALIA7 citations74
US4284101AAug 18, 1981
Pressure-relief valve devices
GEWERK EISENHUETTE WESTFALIA19 citations74
US4074695AFeb 21, 1978
Pressure-relief valve devices
GEWERK EISENHUETTE WESTFALIA15 citations74
US4068893AJan 17, 1978
Apparatus for controlling water spraying operations in mineral mines
GEWERK EISENHUETTE WESTFALIA10 citations74
US5060556AOct 29, 1991
Arrangement for emergency operation of hydraulic appliance in an electro-hydraulically controlled mineral mining installation
GEWERK EISENHUETTE WESTFALIA16 citations73
US4451181AMay 29, 1984
Control systems for mineral mining installations
GEWERK EISENHUETTE WESTFALIA11 citations72
US4169689AOct 2, 1979
Tensioning a longwall mineral mining installation
GEWERK EISENHUETTE WESTFALIA10 citations70
US4099782AJul 11, 1978
Control system for a mineral mining installation
GEWERK EISENHUETTE WESTFALIA7 citations70
US4790347ADec 13, 1988
Pressure-relief valve devices
GEWERK EISENHUETTE WESTFALIA20 citations69
US5157947AOct 27, 1992
Balanced hydraulic valve devices
GEWERK EISENHUETTE WESTFALIA9 citations68
US4534584AAug 13, 1985
Hydraulic connecting device
GEWERK EISENHUETTE WESTFALIA9 citations66
US4302034ANov 24, 1981
Hydraulic coupling device
GEWERK EISENHUETTE WESTFALIA10 citations66
US4613257ASep 23, 1986
Hydraulic control arrangement
GEWERK EISENHUETTE WESTFALIA5 citations63
US4572709AFeb 25, 1986
Control apparatus
GEWERK EISENHUETTE WESTFALIA6 citations63
US4537221AAug 27, 1985
Hydraulic control devices for use with mining apparatus
GEWERK EISENHUETTE WESTFALIA3 citations63
US4534681AAug 13, 1985
Mine roof supports
GEWERK EISENHUETTE WESTFALIA4 citations63
US4493340AJan 15, 1985
Hydraulic coupling
GEWERK EISENHUETTE WESTFALIA6 citations63
US4440522AApr 3, 1984
Hydraulic control arrangement for a roof support unit of a mineral mining installation
GEWERK EISENHUETTE WESTFALIA3 citations63
US4391181AJul 5, 1983
Hydraulic control systems for mining apparatus
GEWERK EISENHUETTE WESTFALIA5 citations63
US4310027AJan 12, 1982
Hydraulic control devices for use with mining apparatus
GEWERK EISENHUETTE WESTFALIA2 citations63
US4306822ADec 22, 1981
Hydraulic control means
GEWERK EISENHUETTE WESTFALIA5 citations63
US4247226AJan 27, 1981
Hydraulic conduit systems for mine installations
GEWERK EISENHUETTE WESTFALIA4 citations63
US4191498AMar 4, 1980
Hydraulic roof support control system
GEWERK EISENHUETTE WESTFALIA6 citations63
US4048866ASep 20, 1977
Apparatus for use in controlling the tension of a chain or chains of mining equipment
GEWERK EISENHUETTE WESTFALIA2 citations63
US4046060ASep 6, 1977
Hydraulic control systems for use with mining apparatus
GEWERK EISENHUETTE WESTFALIA6 citations63
US4737052AApr 12, 1988
Distributor
GEWERK EISENHUETTE WESTFALIA3 citations62
US4536017AAug 20, 1985
Connecting devices for use with pneumatic or hydraulic hoses
GEWERK EISENHUETTE WESTFALIA6 citations62
US4443135AApr 17, 1984
Control apparatus
GEWERK EISENHUETTE WESTFALIA2 citations62
US4422807ADec 27, 1983
Mine roof supports
GEWERK EISENHUETTE WESTFALIA6 citations62
US4391553AJul 5, 1983
Hydraulic control systems for and methods of controlling the operation of tunnelling apparatus
GEWERK EISENHUETTE WESTFALIA4 citations62
US4325659AApr 20, 1982
Mineral mining installation
GEWERK EISENHUETTE WESTFALIA6 citations62
US4394875AJul 26, 1983
Actuator for a mine roof support unit
GEWERK EISENHUETTE WESTFALIA2 citations58
US4718458AJan 12, 1988
Distributors for pressure fluid control system in mineral mining installations
GEWERK EISENHUETTE WESTFALIA1 citations52
KERNFORSCHUNGSANLAGE JUELICH
3 patentsUS4496373AJan 29, 1985
Diffusion membrane and process for separating hydrogen from gas mixture
KERNFORSCHUNGSANLAGE JUELICH80 citations96
US4713234ADec 15, 1987
Process and apparatus for conversion of water vapor with coal or hydrocarbon into a product gas
KERNFORSCHUNGSANLAGE JUELICH102 citations94
US4781734ANov 1, 1988
Non-porous hydrogen diffusion membrane and utilization thereof
KERNFORSCHUNGSANLAGE JUELICH16 citations69